Queue implementation
As other lists queues can also be implemented in two ways:
1. Static implementation using arrays 2. Dynamic implementation (using pointers).
If Queue is implemented using arrays, we must be sure about the exact number of elements we want to store in the queue, because we have to declare the size of the array at design time or before the processing starts. In this case the beginning of the array will become the front for the queue and the last location of array act as rear for the queue. The following relation gives the total number of elements present in the queue when implemented using arrays.
Font - rear + 1
As note that if rear < front then will be no element in the queue or queue is always be empty.
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